Joss Whedon: 'Avengers' Sequel Was a "Nightmare" Due to Expanded Superhero Cast — hollywoodreporter.com

Directing arguably the most anticipated sequel of the year is no easy feat. But Joss Whedon said dealing with fans' expectations for Avengers: Age of Ultron was not the main challenge, but the expanded superhero ensemble. "Shoot me in the face! It is a nightmare. I long for the simple movies like Serenity!" he told U.K. magazine SFX. "This is the hardest juggling act I have ever, ever tried to pull off."

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